Malicious PDF — malware analysis report

Static analysis result for SHA-256 149366e69ac43f6d…

MALICIOUS

PDF

90.7 KB Created: 2021-06-26 15:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 492f5da201f8a3dd7746347481055132 SHA-1: f3754b93d02145488cacb4a4e919bac452a4f984 SHA-256: 149366e69ac43f6d0d883fc086860ce4fff9df6c81f58d0aa943456341daf3fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of numerous unknown URLs further supports this, likely serving as a distribution point for phishing or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c8209e650ce7e78405fd024e232aca7e/72244881389.pdf
    • http://mosjob.ru/images/file/satupek.pdf
    • https://implant-drill.com/userfiles/file/88231698595.pdf
    • https://airshow-bg.com/file/lowisulakazerutelanas.pdf
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/1c0905ac72418a0805c3f4ab36c6e234/67018636078.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a572ef64a17---kevesobunoz.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/cq8k862ld9v0lu1l7pibsh6q40/53723351205.pdf
    • http://agcslohian.com/userfiles/file/31527331075.pdf
    • https://pasarantogel.com/contents//files/43280602640.pdf
    • http://proxima-design.cz/files/file/sapokezowoxanunasetunegij.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/993b696b1e1df1f3b5785f9774043b3d/11859583527.pdf
    • https://aprilboya.com/userfiles/file/94956919201.pdf
    • http://faw-asia.com/image/upload/files/51492704433.pdf
    • http://kengosushionlineorder.com/uploads/files/93293098601.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f304fcf73a---99751640632.pdf
    • http://ecogestval.com/userfiles/file/18916655756.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cf0e5217e---poxapobaniwatipokekat.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/noak9ikvhtmcspf3j7nqc26o36/jusiwujakesipodavafudusow.pdf
    • http://fujavietnam.com/images/Download/lugameximipa.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/6f5b5c20ff3b61be93541f819eb8ce38/pofofim.pdf
    • https://diedacorporation.net/freesiafiles/file/84472519897.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/592832082118761d155694b50ee3ab56/78493915441.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/mfq33lgjgkqigf4roatm8rkb7v/26708721860.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=define+inflected+language
    • https://mediaget.com/userfiles/files/25778002170.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec0c.bin
03c4a421134e18619af157c9e3d9dd08f4235a16e5f392e61ffbf87b081c52a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 21744 bytes
font_01_sfnt_off000121cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x121CF 16792 bytes
font_02_sfnt_off000139e6.bin
af69c6915edc108460cc375df17109252fb1a3368392cb069ffbab49e5d2d3cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x139E6 10364 bytes
font_03_sfnt_off00015137.bin
3e93f7b6ef0b71b4da8a90786694da0b2ca1c65b5ce9ef5824bc2debbc81ae51
pdf-font-stream PDF embedded font (sfnt) at offset 0x15137 2336 bytes